Danielle says, "We've had to order some more, and kind of work with other stores to ensure we have enough to get us through the day. Because of increased demand, it's harder to get, but we're not really affected by the shortage."

Donohue says Tamiflu helps reduce the severity and duration of the flu.

"Within two days of developing symptoms, you should start taking the Tamiflu- after you've seen a doctor and been diagnosed with the flu. Or, if you've been around someone who has been diagnosed with the flu, within two days you should also start it as prevention," Danielle explains.

Health experts say do not confuse the common cold with the flu.

"The common cold and the flu are similar except with the flu, there's severe fever, severe body ache, severe sweating- pain all over is more severe than the common cold," says Danielle.